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\bibitem{Krstajic_etal2010} {\textquotedblleft}\textit{Landau levels and magnetopolaron effect in dilute GaAs:N}{\textquotedblright}. Krstaji{\'c} PM, Peeters FM, Helm M, Solid state communications \textbf{150}, 1575 (2010).   http://doi.org/10.1016/j.ssc.2010.05.044

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